Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 2, Problem 86SDP
Find or prepare some solid circular pieces of brittle materials, such as chalk, ceramics, etc. and subject them to the type of test shown in Fig. 2.9 by using the jaws of a simple vise. Describe your observations as to how the materials fracture. Repeat the tests, using ductile materials, such as clay, soft metals, etc., and describe your observations.
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Chapter 2 Solutions
Manufacturing Engineering & Technology
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Draw an illustration showing the five stages of ductile tensile fracture, then briefly explain the phenomenon happening on different stagesarrow_forward1. Describe tensile test in detail considering the steps. Define stress, strain (equations and units), elasticity modulus, elastic and plastic zones, toughness, and resilience of a material. Additionally, describe the difference between ductile and brittle material. Demonstrate a stress- strain curve to explain your answers.arrow_forwardExample A 13 mm-diameter tensile specimen has a 50 mm gage length. The load corresponding to the 0.2 percent offset is 6800 kg and the maximum load is 1800 kg. Fracture occurs at 7300 kg. The diameter after fracture is 8 mm and the gage length at fracture is 65 mm. calculate the standard properties of the material from the tension test.arrow_forward
- Consider a steel plate with a through-thickness edge crack like the one shown in Fig. 6.21f. The plate width (W) is 75 mm, and its thickness (t) is 12.0 mm. Furthermore, the plane-strain fracture toughness and yield strength values for this material are 80 MPa m1/2 and 1200 MPa, respectively. If the application in which the plate is used is expected to cause a stress of 300 MPa along the axis perpendicular to the crack, would you expect failure to occur if the crack length a is 15 mm? Explain.arrow_forwardSketch Figure 1.3, curve b (a ductile metal). Label it with the following terms, indicating from which location on the curve each quantity can be identified or extracted: elastic region, plastic region, proportional limit, tensile strength, onset of necking, fracture stress.arrow_forwardExplain the differences between a ductile material and brittle material. Also, draw their strain-stress diagrams.arrow_forward
- A sample of giant reed is shaped into a beam with a square cross section of 15.5 mm by 15.5 mm. Two supports placed 22.1 mm apart support thesample and a load is applied halfway between the support points in order to test the force required to fracture the sample. If ultimate tensile strength is912 MPa, what would be the force F (newtons) required to cause failure?arrow_forwardThe data shown in the table below were obtained from a tensile test of high-strength steel. The test specimen had a diameter of 13mm and a gage length of 50mm. At fracture, the elongation between the gage marks was 3.0mm and the minimum diameter was 10.7mm. Plot the conventional stress-strain curve for the steel and determine the propotional limit, modulus of elasticity (i.e the slope of the initial part of the stress-strain curve), yield stress at 0.1% offset, ultimate stress, percent elongation in 50mm, and percent reduction area. TENSILE-TEST DATA Load(kN) Elongation(mm) 5 0.005 10 0.015 30 0.048 50 0.084 60 0.099 64.5 0.109 67.0 0.119 68.0 0.137 69.0 0.160 70.0 0.229 72.0 0.259 76.0 0.330 84.0 0.584 92.0 0.853 100.0 1.288 112.0 2.814 113.0 Fracturearrow_forwardAn unknown specimen with an initial diameter of 5.25 mm experiences a reduction in diameter to 4.50 mm under a tensile load of 250 N. Calculate the engineering stress, engineering strain, true stress, and true strain at this load. Assume that the deformation is uniform throughout the entire sample, and that the volume of the sample remains constant when being pulled in tension.arrow_forward
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